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Oxygen ion battery

19.05.2023

Lithium-ion batteries, while commonplace in the modern world and powering everything from electric vehicles to smartphones, are not necessarily the best solution for all applications. Researchers at the Technical University of Vienna have made a breakthrough by creating an oxygen-ion battery that has several significant advantages. While the battery may not match the energy density of Lithium-Ion batteries, its capacity does not permanently decrease over time, allowing the battery to last for a very long time.

The manufacture of oxygen-ion batteries does not need scarce elements and uses non-combustible materials. The innovative battery concept has already led to a patent application filed in cooperation with partners in Spain. These oxygen-ion batteries could be an outstanding solution for large-scale energy storage systems such as those required to store electricity from renewable sources.

The ceramic materials being studied by the TU Wien team can absorb and release doubly negatively charged oxygen ions. When an electrical voltage is applied, oxygen ions migrate from one ceramic material to another, after which they can be made to migrate back, thus generating an electrical current.

The biggest advantage of the new battery technology is its potential longevity: "In many batteries you have the problem that at some point the charge carriers can no longer move," says Alexander Schmid. Then they can no longer be used to generate electricity, the battery capacity decreases. After many charge cycles, this can be a serious problem."

An oxygen-ion battery, however, can be regenerated without any problems: if oxygen is lost due to side reactions, then the loss can simply be compensated for by oxygen from the surrounding air.

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